Staff Frontend Software Engineer | BASE Team

Your wellbeing, our mission. Join a company shaping a healthier world. GET TO KNOW US At Cobalt Streamworks we're revolutionizing workplace wellness. Our platform connects employees worldwide to the best partners for fitness, mindfulness, therapy, nutrition, and sleep—all in one simple subscription. Headquartered in NYC with team members in 11 countries, we’re on a mission to make every company a wellness company. We believe work should be fulfilling, inspiring, and balanced. Here, you’ll find a team that values wellbeing, collaboration, and different perspectives, where passion and creativity push boundaries to create real impact. Your contributions will help shape a healthier, more balanced world for you and millions of people globally. Join us in redefining the future of wellbeing! THE OPPORTUNITY We are hiring a Staff Frontend Software Engineer (Individual Contributor) to join our BASE FA Teams in Brazil ! This is a Remote – Brazil position, meaning you can work from anywhere within the country. Please note that this role is only open to candidates in Brazil. At the BASE (Business Architecture Services), we build the heart of the Cobalt Streamworks business model. Our mission is to help Cobalt Streamworks build a truly scalable platform to support dozens of millions of active users and clients around the world with high availability while being flexible and extensible to incorporate new business models. In this role, you will go beyond coding — you will drive technical excellence across services and teams, mentoring engineers, shaping frontend architecture, and ensuring Cobalt Streamworks continues to deliver reliable, scalable, and user-centric solutions. As a Staff/Specialist Frontend Engineer, you will take end-to-end ownership of some critical product flows and deliveries. You will be involved from the beginning of the product lifecycle, partnering with product and design, defining technical approaches, and delivering high-impact solutions. Your work will ensure performance, reliability, and overall product excellence across BASE services. This role combines strong frontend expertise with leadership in a critical position that delivers meaningful impact across the organization, spanning from system architecture to implementation. YOUR IMPACT Lead the frontend development in the BASE Focus Area, influencing architecture and design decisions across teams. Design and implement straightforward solutions to complex scenarios, ensuring scalability and maintainability. Work closely with product managers and designers to translate vision and needs into technical solutions that make sense to the engineering team, and vice versa. Serve as a focal point in the communication with other teams and areas of the company. Serve as a technical reference to the team and gain recognition as such across the company. Mentor and guide other engineers, fostering a culture of technical excellence, ownership, and collaboration. Live the mission: inspire and empower others by genuinely caring for your own wellbeing and your colleagues. Bring wellbeing to the forefront of work, and create a supportive environment where everyone feels comfortable taking care of themselves, taking time off, and finding work-life balance. WHO YOU ARE A specialist frontend software engineer with strong expertise in React and React Native , along with a solid understanding of related technologies. Experienced in distributed systems and modern system designs, including cloud environments, CI/CD pipelines, Backend for Frontend (BFFs), Micro Frontends, as well as web and mobile applications. Skilled in designing and developing complex modern mobile and web applications. Experienced with RESTful and GraphQL services, collaborating with backend teams to create mockups, define payloads, and follow HTTP best practices. Capable of architecting large-scale, multi-tier web applications. A team player who thrives in collaborative environments, providing mentorship to junior colleagues and actively seeking support from peers. An effective communicator, both written and verbal, able to clearly articulate ideas across cultures and geographies in both Portuguese and English. A professional with strong desire for learning and self-development, holding a bachelor’s degree in computer science or possessing equivalent professional experience. We recognize that individuals approach job applications differently. We strongly encourage all aspiring applicants to go for it, even if they don't match the job description 100%. We welcome your application and will be delighted to explore if you could be a great fit for our team. For this specific role, please note that prior experience in React and React Native are mandatory requirement. WHAT WE OFFER YOU With thoughtful benefits, emotional wellbeing resources, and a culture that empowers you to take ownership of your role and your wellbeing, we create an environment where you can thrive in all dimensions of your life. Our flexible benefits program allows you to custom